[dns-operations] Adding CNAME for the root domain issue

Andrew Sullivan ajs at anvilwalrusden.com
Wed Apr 27 21:22:21 UTC 2016

On Wed, Apr 27, 2016 at 08:56:18PM -0000, John Levine wrote:
> >The semantics of "CNAME" are, "the owner name is actually this other
> >name".  Therefore, to have any other data at the CNAME would be
> >absurd.
> OK.  How about this?
> --- one zone ---
> $ORIGIN foo.example
> foo.example. CNAME bar.example.

Not possible.  That's an invalid apex, because it doesn't have an SOA.
SOA means "start of authority" after all.  

> PS: Personally, I have no idea what the answer is other than I doubt
> that the people who write name servers have tested for this case.

Some have, and some haven't.


Andrew Sullivan
ajs at anvilwalrusden.com

More information about the dns-operations mailing list